Alarm-lock



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(No Model.) a sheets-sheen 2. G. J. KELLER.

. ALARM LOCK.

No. 424,886. 8 Patented Apr. l; 1890.

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Y ALARM 1.00K. No. 424,886. Patented Appl, 1890.

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UNITED STATES 'PATENT OEEICE.

GEORGE J. KELLER, OF OSCEOLA, NEBRASKA.

ALARM-LOCK.

SPECIFICATION forming part of Letters Patent No. 424,886, dated April 1,1890.

Application filed December 30, 1889. Serial No. 335,340. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, GEORGE J. KELLER, of Osceola, in the county of Polkand State of Nebraska, have invented certain new and-useful Improvementsin Combination-Locks for Sliding Doors; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform part of this specification.

My invention relates to an improvement in combination-locks for slidingdoors; and it consists in the combination of a sliding door, and theplate which is secured to the doorframe, with a series of pivotedlatches, endwise-moving operating-rods to which the knobs are secured atone end, springs applied to the rods, 'a bent rod for each latch l'andwhich is operated by the movement of the knob, and an alarm, as will bemore fully described hereinafter.

The object of my invention is to provide a combination-lock for slidingdoors, and which is so constructed that only the person knowing thecombination can open the door without sounding an alarm.

Figure l is a horizontal section taking through the door just above thelock. Fig. 2 is a view of the operating parts of the lock alone, theknob being removed, Fig. 3 is an edgeview of the lock, partly insection. Figs. 4 and 5 are-detail views.

A represents a sliding door, which is provided with a handle B, lof anysuitable description, for moving the door back and forth from theoutside, and which handle has a shield C connected thereto for .thepurpose of hiding from view the ends of the operatingrods D, so that aperson cannot see what ones are operated in order to open the door.Placed upon each one of these rods D, to which the handles E are appliedat their in'- ner ends, is a spiral spring F, which bears against alatch G at one end for forcing it into an operatingposition, and againsta plate I-I, which is secured t-o one side of the door, and which has aseries of openings or perforations through it corresponding to thenumber of endwise-movin g operating-rods D. There are any desirednumbeliof the latches G', which door.

made through the plate L, which is secured to the door-frame, as shownin Fig. 1. These latches pass through the perforated plate M,

which is secured to the edge of the door, and

which plate limits their lateral movement at vtheir outer ends.

Fastened to the inner end of each of the endwise operating-rods D is aknob or a handle E, by means of a screw O, the ends of the rods D beingeach provided with two screwholes I, as shown, so that the handle E canbe adjusted into either one of two positions, according as thecorresponding latch lG is moved into or out of the combination. Theinner end of each knob or handle E that is in the combination is made tobear against its corresponding latch G, as shown in Fig. l, so that whena rod D is pulled from one end or pushed from the other the tension ofits spring F is overcome and the latch G movedl far enough to allow theend of the latch to .be disengaged from the outer edge of the openingmade in the plate L, and the door pushed open.

The latch shown in Fig. l is in the combination, and is limited in itsmovement toward the door, as hereinafter described, for the purpose ofpreventing the inner shoulder-of the said latch from engaging the inneredge of the opening made in the plate L.

Formed upon the inner end of each of the' knobs or the handles E is aprojection Q, and these projections are turned so as to project downwardfrom the inner end of the hollow knob or handle when it is used in thecombination, and when any number of the latches are thrown out of thecombinationvthe screw O is removed from the knob'or handle E, andtheknob reversed in position, so that the proj ections Q extend upward,as shown in Figs. 2 and 3. Used in connection with these' knobsorhandles E are the partially-revolving rods R, which are provided withcranks S at their inner ends and have their outer ends turned downwardand provided with the knobs T, so

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as to strike against a metallic plate U and thus sound an alarm when theemlwise-mov ing rods D, which are not in the combination, are used.These rods ltare supported in suitable bearings V, and are preventedfrom having an endwise movement by means of enlargements \V on each rod,and which enlargements catch upon opposite sides et one of the bearingsV. These bearings V conk sist of vertieal'rods or castings, as shown inFig. 5, and which are made in two parts, so as to allow the outer partto be removed at any time, and the rods R placed in or moved fromposition at the wish of the operator. The cranks S on the inner ends ofthe rods R catch behind the projections Q. on the inner ends of theknobs or handles E,and when any one or :more of the rods D, which arenot in the combination, are moved, these cranks are operated so as tocause an alarm to be sounded, and thus give notice of an intruder. \Vhencertain of the latches are to be used in the combination, thecorresponding` knobs are removed from the rods D and turned around, sothat the projections Q extend downward, and thus do not operate thecranks S ot the rods R. Those latches which are not to be used in thecombination have their corresponding knobs attached to the rods D insuch a manner that the projections Q extend upward, so as to cause therods R to partially revolve when the knobs and rods are moved endwisc.

In order to limit the lateral movement ot' each latch G, whether in orout of the operative combination, an L-shaped casting N is used, andwhich is secured inside of the openings in the plate M, as shown in Fig.3, by suitable fastening-screws. castings N are turned in 011e position,they limit the distance that the latches shall be moved inward by thepressure of the knobs Y or handles, and when placed in another positionthey limit the distance that the latches shall move outward.

As shown in Fig. 3, the two upper latches are in the combination, whilethe three lower ones are shown out of the combination. The latches whichare in the combination are allowed to move outward and engage the outeredge of the openings made in the plate L, but are prevented from movinginward, so as to engage the inner edge of said openings by placing thecastings N between the said latches and the inner edge of the openings;but the latches which are out of the combination are prevented frommoving outward, so as to engage the outer edge ot the said openings inthe plate L by placing the castings N between them and the outer edge otthe opening, while they are allowed to move freely inward and engage theinner edge of the openings when their respective rods D are operated.

lVhen the castings il are placed inside ol' the latches G and thecorresponding rods D are moved endwise, the latches are prevented Whenthese from being;` moved inward past the middle position, where the doorcan betreely opened. All ot the latches in the combination freely engagewith the outer edges ol.' the openings made in the plate L when the dooris closed, while those latches not in the combination do not engage withit at all. It the latches in the combination are moved, they unlock thedoor; but if the latches not in the combination are moved they lock.,thedoor instead ol' unlocking it.

For the purpose of regulating the distance that the rods D are to bemoved when they are in or outot' the combination the two holes P in therods D are used. The knobs or handles E, corresponding to the latches G,which are in the combination, are moved inward as far as possible uponthe ends of the endwise moving rods D, and the screw O is passed throughthe inner screw-hole P and the knobs ol' those latches which are not inthe combination are moved outward upon the ends ot the rods D, and thescrew O is passed through the outer screw-hole, so that they will have alonger movement than those wh ich are in the combination, and thus-causea loud alarm to be sounded; but a very slight movement of theendwise-movin g rod D ol any of the latches which are out of thecombination is necessary to cause the latch to engage with the plate Lso as to lock the door.

The different combinations are made as tollows: lt any latch or latchesare wanted in a combination at the pleasure ot' the owner the screw O,as shown in Fig. l., is moved from the knob of every latch that iswanted in the combination and the knob is removed from the end of therod D and then turned halt` way around, so as to bring the projections Qon its lower side, where it will not operate the crank S on a rod R. Thecorresponding eastings N to all of the latches needed in the combinationare secured in position, so that they will be placed inside of thelatches, as shown in the upper portion of Fig. 3. All of those latcheswhich are not wanted in the combination have their knobs or handles Esecured to the corresponding endwise-movin g rods D, so that theprojections Q extend upward and catch in t'ront of the cranks S, and theknobs or handles have the screw O passed through the outer hole P in therod D. The object in having two holes P is to give a longer movement tothe endwise-moving rods D when the knobs are moved outward than theywould have when the knobs are moved inward and the screw is passedthrough the inner hole. Then the knob is forced inward and the screwpassed through the inner hole, the inner end oli' the knob iS ln'oughtmuch nearer to the latch G, and the rod colisequently has a shortermovement.

I do not limit myselt' to any particular number of knobs or latches, forthis may be varied at will. Ot" the number used any one, two, or more ofthe latches may be used in the combination or not, as maybe preferred.These lOO IIO

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latches are kept separate from each other at their inner ends upon therod I by means of tubes or collars, which are placed upon the rod I forthis purpose. Any suitable sounding` metal may be used in making theplate U, Which is attached to the plate K by means of supports X.

l-Iaving` thus described my invention, I clamr .1. The combination ofthe pivoted latches provided with double catches at their outer ends,and perforated plate L, secured tothe door-frame and With which the endsof the latches engage, the endwise-moving springactuated rods D, whichpass through the door, and the latches, the knobs or handles securedthereto and provided with projections, the

crank-rods, and the plate U, substantially as shown.

2. The combination of the latches G, pivoted at their, inner ends and.provided With double catches at their outer ones, the perforated plateL, secured to the door, the plate 'c GEORGE J. KELLER.

Witnesses:

L. D. HAMILTON, I. M. KELLER.

